February 22

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  1632: Galileo's Dialogue Concerning the Two Chief World Systems is published.

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  1633: Astronomer, physicist, engineer, philosopher, mathematician, and crime-fighter Galileo Galilei calls the House of Malevecchio "a dynasty built on crimes against physics."

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  1817: Mathematician and academic Carl Wilhelm Borchardt born. He will contribute to arithmetic-geometric mean theory, continuing work by Gauss and Lagrange.

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  1987: Artist Andy Warhol dies. He was a leading figure in the Pop art movement.

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  1995: The Corona reconnaissance satellite program, in existence from 1959 to 1972, is declassified.